Displaying 2 results from an estimated 2 matches for "spkernel2d".
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kernel2d
2007 Dec 17
1
polygon class in splancs package
Dear forum,
I would like to use the kernel2d or spkernel2d in the Splancs-package, but
it does not recognize my polygon data.
"Error in kernel2d(as.points(ptsbin), polygonprov, h0 = 2, nx = 100, : " is
the error message.
Invalid poly argument
The data are defined as follows:
polgonprov<-list(x=polyprov$X, y=polyprov$Y) with...
2009 Aug 18
0
kernel density estimation for univariate data using splancs
...im). Here is my code:
coords <- S at polygons[[1]]@Polygons[[1]]@coords
coord <- as.points(coords)
cases1.xy <- as.points(mergedis$jit.x.x, mergedis$pre.fsa.shp.Y2)
grd1 <- GridTopology(cellcentre.offset=c(50281627.2, 580082), cellsize=c(0.2, 0.2), cells.dim=c(75,100))
k1000 <- spkernel2d(cases1.xy, coord, h0=1000, grd1)
k5000 <- spkernel2d(cases1.xy, coord, h0=5000, grd1)
if (.sp_lt_0.9()) {
df <- AttributeList(list(k1000=k1000, k5000=k5000))
} else {
df <- data.frame(k1000=k1000, k5000=k5000)
}
kernels <- SpatialGridDataFrame(grd1, data=df)
spplot(kernels, checkEmp...